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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
Which of the following is the correct way of expressing the rating of a fuse?

Ampere-hours
Watts
Amperes
Volts

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SSC JE Electrical 2019 with solution SET-2
A coil of 360 turns is linked by a flux of 200 μWb. If the flux is reversed in 0.01 second, then find the EMF induced in the coil?

7.2 V
14.4 V
0.72 V
144 V

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Given


SSC JE Electrical 2019 with solution SET-2
While estimating the overhead lines, if the number of poles required is 14, then what is the estimated number of earth sets required?

3
2
4
5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

While estimating the overhead lines, the first and last pole is always earth connected and after every 3rd electrical pole, the fourth pole is earthed. Therefore, the approximate number of required ground set = 4
 

SSC JE Electrical 2019 with solution SET-2
In an alternator, if α = 60°, then find the pitch factor?

1
1/2
0
√3/2

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The factor by which, the induced E.M.F gets reduced due to short pitching is called pitch factor or coil span factor denoted by Kc. It is given as
Kc = cosα/2
given
α = 60°
Kc = cos60/2
Kc = cos30°
Kc = √3/2

SSC JE Electrical 2019 with solution SET-2
Which of the following heating element has the lowest operating temperature?

Eureka
Kanthal
Graphite
Nichrome

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The melting point of Eureka is 1221 to 1300 °C
The melting point of Kanthal is 1,425 °C
The melting point of Nichrome is 1400 °C
The melting point of Graphite is 3,600°C
Hence Eureka has the least range of temperature.
 

SSC JE Electrical 2019 with solution SET-2
The change in DC excitation of a synchronous motor will also change the

Load angle
Power factor
Speed of the motor
Supply voltage

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